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Real time technique for tracking weld joints of gas metal arc welding by magnetic controlled electric arc sensor

A melting electrode gas and arc sensing technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of low control precision, poor real-time performance, complex structure, etc., and achieve high control precision and good tracking effect , good real-time effect

Inactive Publication Date: 2008-12-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention is mainly to solve the problems of complex structure, low control precision and poor real-time performance of the current automatic tracking control system for gas metal arc welding.

Method used

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  • Real time technique for tracking weld joints of gas metal arc welding by magnetic controlled electric arc sensor
  • Real time technique for tracking weld joints of gas metal arc welding by magnetic controlled electric arc sensor
  • Real time technique for tracking weld joints of gas metal arc welding by magnetic controlled electric arc sensor

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Embodiment 1

[0014] Embodiment 1, the present invention is composed of a welding system composed of a magnetically controlled arc sensor, a welding torch and a welding power supply, a control system, a tracking actuator, and the like. The magnetically controlled arc sensor is installed on the welding torch, and the welding torch is installed on the tracking actuator. The magnetron arc sensor generates an alternating magnetic field, which drives the gas metal shielded welding arc to oscillate at a certain frequency and amplitude, thereby scanning the weld seam to obtain weld seam information, which is filtered and amplified by the filter circuit and then sent to the control system for processing and control. The system adjusts the slider execution structure and the welding trolley in real time, so as to track the welding seam. The welding point of the system is the deviation signal collection point, which can be tracked while welding, and the real-time performance is very good. refer to f...

Embodiment 2

[0017] Embodiment 2, the magnetron arc sensor of the present invention comprises components such as excitation power supply, magnetic field generating device, Hall sensor, wherein the magnetic field generating device is installed directly on the welding torch of MIGA welding, and the temperature during welding is very high , there are particularly many spatters, and a pair of magnetic poles of the magnetic field generating device are made of high-temperature-resistant materials, and made into a replaceable form. Refer to the structure of the magnetron arc magnetic field generator figure 2 . The function of the excitation power supply is to generate an excitation current with adjustable frequency and amplitude and two interrupt pulse signals with the same frequency as the excitation current. The function of the interrupt pulse signal is to determine the position where the sampling starts. For the structure diagram of the excitation power supply, refer to image 3 . During we...

Embodiment 3

[0018] Embodiment 3, the filtering circuit of the present invention uses two Butterworth low-pass filters in series for hardware filtering. Since the arc length is short, the spatter is large, and there are many interference factors in MIG welding, the processing of the sampling signal is very important, so the hardware adopts such as Figure 4 2 cascaded Butterworth low-pass filters for hardware filtering. refer to Figure 4 , and the rest are the same as the above-mentioned embodiment.

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Abstract

The invention discloses a real-time follow-up technique of a magnetic controlling arc sensing welding line of gas metal arc welding, which belongs to a welding control technique. The invention mainly solves the problems of complex structure, high cost, unstable performance and poor real-time performance, etc, of the prior gas metal arc welding line follow-up system. The invention adopts the technical proposal that the real-time follow-up technique comprises a magnetic controlling voltaic arc sensor, a welding system composed of a welding torch, a welding electric source and so on, a control system, a follow-up actuating mechanism composed of a set of cross sliding guides, a wheel robots and so on; wherein, the magnetic controlling voltaic arc sensor is directly installed on the welding torch, which is used for gas metal-arc welding process, to collect the horizontal and the vertical deviation signals of the welding line; the processed signals are input in a microcomputer for processing by software; the real-time control follow-up actuating mechanism is capable of automatically following up the welding line. The technique achieves automatic following up of the welding line in gas metal arc welding. The magnetic controlling arc sensor is installed on the welding torch used for gas metal-arc welding process, which eliminates the problems of preposing and postposing, and has the characteristics of good real-time performance, low cost, high stable performance and high precision.

Description

technical field [0001] The invention relates to welding control technology, in particular to a welding seam automatic tracking technology for metal gas shielded welding. Background technique [0002] Gas metal arc welding has been widely used in actual production because of its high efficiency, energy saving, simple and convenient operation, and has become an alternative process of manual arc welding. The main problem to be solved in realizing the automatic control of the welding process is the automatic tracking of the welding seam. At present, most of the seam tracking sensors used in MIG arc welding are mechanical arc sensors and laser sensors. The cost is low, but the volume is large, the noise is large, easy to wear, and the control accuracy is not high. Although the control accuracy of the laser sensor is relatively high, its cost is high and its real-time performance is poor. [0003] The research on the magnetron arc is mainly focused on improving the weld seam sh...

Claims

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Application Information

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IPC IPC(8): B23K9/127B23K9/173
Inventor 洪波来鑫洪宇翔尹力魏复理
Owner XIANGTAN UNIV
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